JP6132336B2 - Injection molding machine - Google Patents

Description

  The present invention relates to an injection molding machine including a turntable on which a mold is mounted, and in particular, injection molding that supplies a fluid such as water to a mold that is rotated as the turntable rotates to adjust the temperature. Related to the machine.

  2. Description of the Related Art Conventionally, a two-color molding machine that integrally molds different members in combination is known. In such an injection molding machine called a two-color molding machine, for example, two movable molds are attached to a turntable that is rotatably provided via a mold mounting plate or the like, and one of the fixed molds. And one of the movable molds attached to the turntable are clamped, the molten resin is injected and filled to form the primary molded product, and then the turntable is rotated to leave the primary molded product remaining. One movable mold is moved to a position facing the other fixed mold, the other fixed mold and the one mold are clamped, and molten resin is further injected and filled. One member is formed integrally.

  As related to the prior art, Patent Document 1 discloses an injection molding machine including a turntable for rotating a movable mold. In Patent Document 1, the movable mold is cooled or heated. A reversing disk is provided by wrapping a cable bear (registered trademark) containing the linear body around the reversing disk serving as a turntable, with a linear body comprising a tube for supplying a heat medium for temperature adjustment of It is disclosed that it is possible to invert at a high speed and to prevent the excessive portion of the linear body from drooping downward. Further, in Patent Document 2, a fixed-side 5 a is fixed to the movable die plate 1, and a temperature-controlled water circulation rotary joint 5 is fixed to the turntable (rotary table 2), and the rotary joint 5 is provided. In addition, an injection molding machine that circulates water whose temperature is adjusted to a circulation pipe in the mold in the movable mold 4 through the pipe lines 6A to 11A and 6B to 11B is disclosed.

Japanese Patent No. 3808410 Japanese Patent No. 2007-276261

  However, injection that applies a cable bear (registered trademark) to guide a linear body such as a pipe for supplying a temperature adjusting heat medium disclosed in Patent Document 1 or a rotary joint disclosed in Patent Document 2 In a molding machine, fluid is supplied to a movable mold that is rotated as the turntable rotates. However, such a cable bear (registered trademark) and a rotary joint are relatively complicated. When high-cost parts are used in the structure, periodic maintenance is performed relatively frequently, and the cost increases as the number of parts increases, so it is desirable to eliminate these problems. It was.

  The present invention has been made in view of the above problems, and it is possible to reduce the cost at the same time as the structure for adjusting the temperature of the mold by supplying a fluid such as water to the mold fixed to the turntable. It is an object of the present invention to provide an injection molding machine that can reduce the above.

The invention of the present injection molding machine is an injection molding machine that supplies a temperature-controlled fluid to a mold rotated by a turntable via a plurality of hoses,
A fluid supply device for supplying the temperature-controlled fluid to the mold;
And the turntable is rotated in forward and reverse directions of the mold mounting plate attached to the mold repeatedly at a predetermined angle,
An electric motor for driving the turntable;
A die plate that repeatedly holds the turntable at a predetermined angle in a forward and reverse direction ; and
A fixing bracket having a space portion which is fixed to the die plate and in which the plurality of hoses are disposed ;
A fixing flange attached to one end of the fixing bracket;
A rotating flange provided opposite the fixed flange and rotated together with the turntable;
A connecting pipe for connecting the rotating flange and the mold to supply a temperature-controlled fluid to the mold ;
The plurality of hoses having both ends connected to the rotating flange and the fixing flange in the space portion inside the fixing bracket, and having the flexibility connected to the connection pipe via the rotating flange;
With
While configured to the fluid is supplied by connecting one end of said plurality of hoses to the fixed flange from the fluid supply device, wherein by connecting the other end of the plurality of hoses to the rotating flange When the fluid supplied by the hose is configured to be supplied to the connecting pipe, the length of the plurality of hoses is set longer than the distance between the fixed flange and the rotating flange, With the plurality of hoses twisted in the same direction while being rotated in the forward and reverse directions at a predetermined angle, both ends of the hoses are connected to the fixed flange and the rotating flange, and the turn table is rotatably configured in the forward and backward direction at a predetermined angle repeatedly, configured to provide a fluid for temperature adjustment to the mold which is rotated by the turntable Characterized in that was.

Furthermore, the invention of this injection molding machine
The center portion of the fixed flange and the center portion of the rotating flange are connected by a cylindrical pipe, and an energizing cable for supplying electricity to the mold or a pipe body for supplying air is inserted into the pipe. It is characterized by that.

  According to the invention of the present molding machine, the temperature supplied from the fluid supply device to the mold when adjusting the temperature of the mold rotated in the forward and reverse direction together with the turntable during the operation of the injection molding machine. The regulated fluid can be supplied through a hose and a connecting pipe. Conventionally, when temperature-adjusted water is supplied to a rotating mold in order to adjust the temperature of the mold, the rotary mold or the like having a relatively complicated structure and high cost is used for the mold. Although the temperature is adjusted by supplying temperature-adjusted water, the present invention supplies a temperature-adjusted fluid to the mold with a simple configuration without using parts having such a complicated structure. be able to. Therefore, it is possible to provide an injection molding machine that achieves cost reduction and failure reduction.

It is a front view which shows the principal part of the type | mold opening / closing unit comprised in an injection molding machine. It is sectional drawing which shows the principal part of the mold | die opening / closing unit comprised in an injection molding machine, and has shown the state which removed the movable metal mold | die from the metal mold | die attachment plate. It is a front view which shows a fixed flange. It is sectional drawing of the fixed bracket which shows the state connected in the state which twisted the hose, and shows only one hose among several hoses so that it can grasp | ascertain the state which twisted the hose easily.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention will be described with reference to FIGS. Of course, it goes without saying that the present invention can be easily applied to configurations other than those described in the embodiments without departing from the spirit of the invention.

  The injection molding machine according to an example of the present invention enables so-called two-color molding in which different members are combined and molded integrally, and is rectangular with respect to the turntable 2 that is rotated by using the electric motor 1 as a drive source. The two movable molds 4 and 5 are mounted via the mold mounting plate 3 of the mold, and the two-color molding manufacturing process includes one of the fixed mold (not shown) and one movable mold mounted on the turntable 2. After the mold 4 is clamped, the molten resin is injected and filled to form the primary molded product, the turntable 2 is rotated, and the remaining movable mold 4 of the primary molded product is removed. The two members are integrated by moving to the position facing the other fixed mold, clamping the other fixed mold and the one movable mold 4 and further performing injection filling with molten resin. The whole injection molding machine is designed to mold Although the illustration is omitted, it is roughly divided into an injection unit for injecting and filling molten resin into the mold cavity, and a mold opening / closing unit for opening and closing the mold. The movable die plate 6 is configured to advance and retract when the mold is opened and closed.

  A circular turntable 3 is rotatably mounted on the movable die plate 6 of the mold opening / closing unit, and a gear mounted on the rotating shaft of the electric motor 1 is connected to a gear formed on the outer periphery of the turntable 2. The turntable 2 is driven to rotate in a predetermined direction such as a forward direction or a reverse direction (counterclockwise / clockwise as shown in FIG. 1) by driving the electric motor 1. It is supported by two support rollers 7 provided below the.

  A fixed bracket 8 having a space portion is attached to the movable die plate 6, and a fixed flange 9 is attached to one end of the fixed bracket 8 so as to face the fixed flange 9. A rotating flange 10 that rotates together with the table 2 is disposed.

  The rotary flange 10 and the relay block 16 are connected using the connection pipe 11, and the relay block 16 and the movable molds 4 and 5 are connected using the connection pipe 17, and the space inside the fixed bracket 8 is connected. The plurality of hoses 12 arranged in the flexible pipe have flexibility, one of which is connected to the rotating flange 10 and the other is connected to the fixed flange 9, and the connecting pipe 17 connected to the hose 12 and the movable molds 4 and 5. Are communicated with each other via a rotating flange 10, a connecting pipe 11, and a relay block 16.

  The fluid supply device 13 connected to the fixed flange 9 moves the water as a temperature-controlled fluid through the fixed flange 9, the hose 12, the rotating flange 10, the connection pipe 11, the relay block 16, the connection pipe 17, and the like. By supplying the molds 4 and 5, the temperature of the movable molds 4 and 5 is adjusted. During the operation of the injection molding machine in which the temperature of the movable molds 4 and 5 is adjusted, the turntable 2 to which the movable molds 4 and 5 are attached via the mold attachment plate 3 has a predetermined rotation angle. (In this embodiment, 180 degrees) is repeatedly rotated in the forward and reverse directions, and accordingly, the rotating flange 10 is similarly rotated and the hose 12 is operated so as to be twisted. The turntable 2 has a length that does not hinder the rotation of the turntable 2 at a predetermined rotation angle (at least longer than the distance between the fixed flange 9 and the rotary flange 10). On the other hand, when both ends of each hose 12 are connected, these hoses 12 are connected in a state twisted in the same direction.

  The central portion of the fixed flange 9 and the central portion of the rotating flange 10 in which the rotating shaft 15 is integrally provided are connected by a tubular pipe 14. Inside the pipe 14, an energizing cable (not shown) for supplying electricity to the movable molds 4, 5 and the like rotated together with the turntable 2 and a pipe body (not shown) for supplying air are inserted. The As shown in FIGS. 3 and 1, the ends of the plurality of hoses 12 are intermittently arranged at equal intervals with respect to the fixed flange 9 and the rotating flange 10 with the pipe 14 as the center.

  As described above, according to the present injection molding machine, the turntable 2 that rotates the mold mounting plate 3 to which the movable molds 4 and 5 are mounted in the forward and reverse directions, the electric motor 1 that drives the turntable 2, A movable die plate 6 that rotatably holds the turntable 2, a fixed bracket 8 that has a space portion fixed to the movable die plate 6, a fixed flange 9 that is attached to the fixed bracket 8, and the fixed A rotating flange 10 provided opposite to the flange 9 and rotated together with the turntable 2, a connecting pipe 11 connecting the rotating flange 10 and the relay block 16, the relay block 16 and the movable molds 4, 5 are provided. The connecting pipe 17 to be connected is connected by the rotating flange 10 and the fixing flange 9 in the space inside the fixed bracket 8, and is connected to the connecting pipe 11 through the rotating flange 10. A plurality of hoses 12 having flexibility, and the movable molds 4, 5 are supplied with water as temperature-controlled fluid supplied from the fluid supply device 13 through the hoses 12, connection pipes 11, 17, etc. Is an injection molding machine that adjusts the temperature of the movable molds 4 and 5, and is connected to one end of a hose 12 to the fixed flange 9 and supplied with temperature-adjusted water from a fluid supply device 13. On the other hand, when the other end of the hose 12 is connected to the rotating flange 10 and the temperature-adjusted water supplied by the hose 12 is supplied to the connecting pipe 11, the hose 12 is twisted. It is connected with. Accordingly, when the temperature of the movable molds 4 and 5 rotated in the forward and reverse directions together with the turntable 2 is adjusted during the operation of the injection molding machine, the fluid supply device 13 supplies the movable molds 4 and 5 to the movable molds 4 and 5. The temperature-controlled water thus produced can be supplied through the hose 12, the connecting pipes 11, 17, and the like. Conventionally, when temperature-adjusted water is supplied to a rotating mold in order to adjust the temperature of the mold, the rotary mold or the like having a relatively complicated structure and high cost is used for the mold. Although the temperature was adjusted by supplying temperature-adjusted water, the present invention is temperature-adjusted with respect to the movable molds 4 and 5 with a simple configuration without using parts having such a complicated structure. Water can be supplied. Therefore, it is possible to provide an injection molding machine that achieves cost reduction and failure reduction.

  In the present embodiment, it has been described that water is used as a fluid for adjusting the temperature of the movable molds 4 and 5, but various modifications can be made without being limited thereto. For example, a gas may be adopted in addition to a liquid such as water. Moreover, in the above description, in order to adjust the temperature of the movable molds 4 and 5, it has been described that the temperature-adjusted water is supplied to the movable molds 4 and 5. Of these, water may be circulated using either one as the outward path and the other as the return path.

1 Electric motor 2 Turntable 3 Mold mounting plate 4, 5 Movable mold (mold)
6 Movable die plate (die plate)
8 Fixing bracket 9 Fixing flange 10 Rotating flange 11 Connection pipe 12 Hose 13 Fluid supply device 14 Piping 17 Connection pipe

Claims (2)

An injection molding machine for supplying a temperature-controlled fluid to a mold rotated by a turntable through a plurality of hoses,
A fluid supply device for supplying the temperature-controlled fluid to the mold;
And the turntable is rotated in forward and reverse directions of the mold mounting plate attached to the mold repeatedly at a predetermined angle,
An electric motor for driving the turntable;
A die plate that repeatedly holds the turntable at a predetermined angle in a forward and reverse direction ; and
A fixing bracket having a space portion which is fixed to the die plate and in which the plurality of hoses are disposed ;
A fixing flange attached to one end of the fixing bracket;
A rotating flange provided opposite the fixed flange and rotated together with the turntable;
A connecting pipe for connecting the rotating flange and the mold to supply a temperature-controlled fluid to the mold ;
The plurality of hoses having both ends connected to the rotating flange and the fixing flange in the space portion inside the fixing bracket, and having the flexibility connected to the connection pipe via the rotating flange;
With
While configured to the fluid is supplied by connecting one end of said plurality of hoses to the fixed flange from the fluid supply device, wherein by connecting the other end of the plurality of hoses to the rotating flange When the fluid supplied by the hose is configured to be supplied to the connecting pipe, the length of the plurality of hoses is set longer than the distance between the fixed flange and the rotating flange, With the plurality of hoses twisted in the same direction while being rotated in the forward and reverse directions at a predetermined angle, both ends of the hoses are connected to the fixed flange and the rotating flange, and the turn table is rotatably configured in the forward and backward direction at a predetermined angle repeatedly, configured to provide a fluid for temperature adjustment to the mold which is rotated by the turntable Injection molding machine, characterized in that the. The center portion of the fixed flange and the center portion of the rotating flange are connected by a cylindrical pipe, and an energizing cable for supplying electricity to the mold or a pipe body for supplying air is inserted into the pipe. The injection molding machine according to claim 1, wherein

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